For months Summer is trapped in a cellar with the man who took her - and three other girls: Rose, Poppy, and Violet. His perfect, pure flowers. His family. But flowers can't survive long cut off from the sun, and time is running out...

One ordinary day, one ordinary suicide but it does not stop there. Will the police be able to solve the mystery and bring justice? Follow the chilling story of the world's most notorious string of cases! [based on South Korean justice system]